Regular script suggests Linxi Li Enfei and Lin 'an modern calligrapher Shen Honggen's copybook. Zhang Tianying, Pang Zhonghua's calligraphy is good, too. It's worth kissing.
Calligraphy learning is continuous. I suggest you continue to read and practice calligraphy while you have theoretical knowledge. All kinds of calligraphy magazines and newspapers have good explanations, which are helpful for your progress.
I hope you can learn something!